A kind of protective mask testing system and testing method

Abstract

A protective mask testing system and testing method belong to the technical field of daily necessities protective performance testing. The test system includes a test chamber, a skull model placed in the test chamber, a breathing simulator, an aerosol generator and a real-time monitoring device. The test chamber is equipped with a laser particle counter I, a laser particle counter II, a temperature control device and a temperature and humidity control device. Sensing device, an air chamber is set in the skull model, and the air chamber is respectively connected to a breathing simulator, a laser particle counter II, an oral ambient gas sampling tube, and a nasal ambient gas sampling tube; the laser particle counter I is used for Measure the initial concentration of particles in the test cabin; the laser particle counter II is used to measure the concentration of particles filtered by the mask; the temperature and humidity sensing device is used to measure the humidity and temperature in the test cabin; through the real-time monitoring device Control and test the protective performance of the mask to be tested. The invention not only satisfies the national standard, but also satisfies the diverse testing requirements of customers.

Description

technical field [0001] The invention belongs to the technical field of protective performance testing of daily necessities, and in particular relates to a protective mask testing system for filtering effects of masks on particles of different particle sizes in the air in environments with different temperatures and humidity. Background technique [0002] Since 2014, the country has incorporated smog weather into natural disasters for notification, and wearing a mask is the most direct and effective means of preventing smog for ordinary people when traveling. In the face of the subsequent industry chaos of various dust-proof and haze-proof masks on the market, the national organization formulated and issued the "Technical Specifications for Daily Protective Masks GB / T32610", which clarified that such protective masks The inspection specification, which includes the "test method for the protective effect of particulate matter". [0003] This method uses an aerosol generator t...

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Problems solved by technology

[0004] At present, there are mature equipment on the market that can meet the test requirements of this standard, but the function is too single, and the actual use environment of the mask is different from the standard requirements: when people walk around with a mask, the ambient temperature and humidity of the mask are not Fixed, constant temperature and humidity are not in line with the actual use; similarly, the concentration of particulate matter is not the same in different locations, and the concentration of particulate matter produced by aerosol generators should be variable in one test; the temperature, humidity, concentration of existing equipment The measurement sampling frequency is too low, especially to make up for the above two functional defects. The lower sampling frequency cannot meet the test needs under dynamic changes. These three problems are the problems that our products need to solve

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